6522. Nicosulfuron

Nomenclature

CAS number: 111991-09-4
2-[[[[(4,6-Dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamide; SL-950; MU-495; DPX-V9360; Accent (DuPont); Nostoc (Ipesa).
C15H18N6O6S; mol wt 410.41.
C 43.90%, H 4.42%, N 20.48%, O 23.39%, S 7.81%.

Description and references

Post-emergence sulfonylurea herbicide. Prepn: F. Kimura et al., EP 232067 (1987 to Ishihara Sangyo Kaisha); M. A. Hanagan, US 4789393 (1988 to DuPont); and structure-activity study: S. Murai et al., ACS Symp. Ser. 504, 43 (1992). Activity in soil: T. C. Mueller et al., Tenn. Farm Home Sci. 167, 17 (1993). Adsorption on clay minerals: L. Ukrainczyk, N. Rashid, J. Agric. Food Chem. 43, 855 (1995). Field trial for johnsongrass in corn and effect on yield: N. G. Gubbiga et al., Weed Technol. 9, 574 (1995).

Chemical structure

Properties

Colorless white solid, mp 169-173°. Vapor pressure at 25°: 1.2 × 10 -16 mm Hg. pKa (25°): 4.6. Soly in water (ppm): 44 (pH 3.5); 22000 (pH 7).

Use

Herbicide.